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HUD

A head-up display device and image display technology, applied in transportation and packaging, instruments, vehicle parts, etc., can solve the problems of increased light loss, reduced transmittance, complex control of display panels, etc., and achieve low light loss and simple structure Effect

Active Publication Date: 2020-05-15
MAXELL HLDG LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In Patent Document 1, as a display panel, a liquid crystal display device requiring a backlight, a fluorescent display tube, and a display element using electroluminescence are conceived, and an image is generated with the display panel, but there are problems as follows: Accordingly, the control of the display panel becomes complicated, and the transmittance decreases and the light loss increases, for example, according to the amount transmitted from the liquid crystal display device.

Method used

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Embodiment 1

[0035] In this embodiment, an example will be described in which the display position of the virtual image and the distance from the virtual image to the eyes of the driver are changed in accordance with changes in the speed of the vehicle in the vehicle HUD.

[0036] The vehicular HUD that is the premise of this embodiment projects driving information (for example, speed display, navigation display, etc.) superimposed as a virtual image on the foreground of the forward field of view on the opposite side of the windshield when viewed from the driver. It is necessary to appropriately set the display position and distance of the virtual image of the projected driving information, that is, the distance from the driver's eyes to the display position of the virtual image, so that the driver's line of sight moves as little as possible when viewing the driving information, that is, to enable The driving information can be seen clearly in a state where the focus of the driver's eyes co...

Embodiment 2

[0055] In this embodiment, another configuration of the image display unit will be described. Figure 6 is a configuration diagram of the image display unit in this embodiment. Figure 6 Among them, 25 is a liquid crystal display, 26 is a reflection mirror, and a plurality of reflection mirrors 26 are disposed behind the liquid crystal display 25 .

[0056] Figure 6 In this case, the image from the liquid crystal display 25 reaches the lens 22 via the mirror 26 . The display position 24 of the virtual image is determined according to the distance between the liquid crystal display 25 and the lens 22 . Thus, for example, in the case of the illustrated images a, b, and c, the distance between the image c and the lens 22 is longer than the distance between the image a and the lens 22, so the display position cc of the virtual image of the image c is the same as The display position aa of the virtual image of image a is further away than that. Thereby, depending on which of a...

Embodiment 3

[0060] In this embodiment, another configuration of the image display unit will be described. Figure 7 is a configuration diagram of the image display unit in this embodiment. Figure 7 Among them, 27 is a diffusion plate, and 28 is a movable lens.

[0061] Figure 7 Among them, the image projected (projected) by the projector 20 is imaged by the diffusion plate 27, reflected by the free-form surface mirror 23 through the movable lens 28, and projected a virtual image in front of the eyes of the driver 1 through the windshield 2. . The display position 24 of the virtual image is determined according to the distance between the diffusion plate 27 and the movable lens 28 . Thus, the display position 24 of the virtual image can be changed by moving the position of the movable lens 28 .

[0062] As described above, this embodiment is a head-up display device for projecting a virtual image, which includes: an image processing unit that performs image processing on an image to ...

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PUM

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Abstract

The object of the present invention is to provide a head-up display device, which has a simple structure and small light loss, and can change the display position and distance of a virtual image. In order to achieve the above object, there is provided a head-up display device for projecting a virtual image, which includes: an image processing unit, which performs image processing on an image to be displayed as a virtual image; an image display unit, which projects the image after image processing; and a display control unit for performing display control of an image display unit, the image display unit having: a projector for projecting an image; a diffuser plate for forming an image of the image projected by the projector; and a lens for guiding the image formed by the diffuser plate, the diffuser plate comprising For the plurality of functional liquid crystal films at different distances from the lens, the display control unit changes the display position and distance of the virtual image by controlling the transmission state and white state of the functional liquid crystal films.

Description

technical field [0001] The invention relates to a head-up display device, in particular to a head-up display device capable of changing the display position and distance of a virtual image. Background technique [0002] It is known that, for example, a HUD for a vehicle, which is a type of Head Up Display (Head Up Display: hereinafter abbreviated as HUD), can display driving information necessary for driving in the distance as a virtual image through the windshield, so that the driver's line of sight can be minimized. move. [0003] As background art in this technical field, there is Japanese Patent Application Laid-Open No. 2004-168230 (Patent Document 1). Patent Document 1 discloses a structure in which a plurality of display panels with different optical path distances are provided in order to switchably display virtual images having different distances from the position of the driver's eyes to the displayed virtual images without using a movable mechanism. By switching...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B27/01B60K35/00
CPCB60K35/00G02B2027/0181G02B2027/0183G02B2027/0185G02B27/0101G02B2027/0127B60K35/23B60K2360/23B60K2360/334G02B2027/014
Inventor 三泽昭央花田真希藤田裕司
Owner MAXELL HLDG LTD